Connected: An Internet Encyclopedia
RFC 1072

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Network Working Group
Request for Comments: 1072

V. Jacobson
LBL
R. Braden
ISI
October 1988

### TCP Extensions for Long-Delay Paths

### Status of This Memo

This memo proposes a set of extensions to the TCP protocol to provide efficient operation over a path with a high bandwidth*delay product. These extensions are not proposed as an Internet standard at this time. Instead, they are intended as a basis for further experimentation and research on transport protocol performance. Distribution of this memo is unlimited.

### Table of Contents

1. INTRODUCTION
2. TCP WINDOW SCALE OPTION

2.1 Window Scale Option
2.2 Using the Window Scale Option

3. TCP SELECTIVE ACKNOWLEDGMENT OPTIONS

3.1 SACK-Permitted Option
3.2 SACK Option
3.3 SACK with Window Scaling
3.4 SACK Option Examples
3.5 Generating the SACK Option
3.6 Interpreting the SACK Option

4. TCP ECHO OPTIONS

4.1 TCP Echo and TCP Echo Reply Options
4.2 Using the Echo Options

5. CONCLUSIONS AND ACKNOWLEDGMENTS
6. REFERENCES

Original text document

Next: 1. INTRODUCTION

Connected: An Internet Encyclopedia
RFC 1072